<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.12"></script>
</head>
<body>

<div id="app">

    <first v-for="item in items" v-bind:Q="item"></first>

</div>



<script>

    Vue.component("first",{
        props:['Q'],
        template: '<li>{{Q}}</li>'
    })

    var vm = new Vue({//
        el: "#app",
        data: {
            items: ['A','B','C']
        },
       
    })
</script>


</body>
</html>